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Effects of TM6SF2 E167K on hepatic lipid and very low-density lipoprotein metabolism in humans.

Borén, Jan, 1963 (author)
Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberglaboratoriet,Institute of Medicine, Department of Molecular and Clinical Medicine,Wallenberg Laboratory
Adiels, Martin, 1976 (author)
Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Medicine, Department of Molecular and Clinical Medicine
Björnson, Elias, 1988 (author)
Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Medicine, Department of Molecular and Clinical Medicine
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Matikainen, Nina (author)
Söderlund, Sanni (author)
Rämo, Joel T (author)
Ståhlman, Marcus, 1975 (author)
Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberglaboratoriet,Institute of Medicine, Department of Molecular and Clinical Medicine,Wallenberg Laboratory
Ripatti, Puetaru (author)
Ripatti, Samuli (author)
Palotie, Aarno (author)
Mancina, Rosellina Margherita (author)
Gothenburg University,Göteborgs universitet,Wallenberglaboratoriet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberg Laboratory,Institute of Medicine, Department of Molecular and Clinical Medicine
Hakkarainen, Antti (author)
Romeo, Stefano, 1976 (author)
Gothenburg University,Göteborgs universitet,Wallenberglaboratoriet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberg Laboratory,Institute of Medicine, Department of Molecular and Clinical Medicine
Packard, Chris j (author)
Taskinen, Marja-Riitta (author)
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 (creator_code:org_t)
2020-12-17
2020
English.
In: JCI insight. - : American Society for Clinical Investigation. - 2379-3708. ; 5:24
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Non-alcoholic fatty liver disease (NAFLD) is characterized by hepatic lipid accumulation. The transmembrane 6 superfamily member 2 (TM6SF2) E167K genetic variant associates with NAFLD and with reduced plasma triglyceride levels in humans. However, the molecular mechanisms underlying these associations remain unclear. We hypothesized that TM6SF2 E167K affects hepatic very low-density lipoprotein (VLDL) secretion, and studied the kinetics of apolipoprotein B100 (apoB100) and triglyceride metabolism in VLDL in homozygous subjects. In 10 homozygote TM6SF2 E167K carriers and 10 matched controls, we employed stable-isotope tracer and compartmental modeling techniques to determine apoB100 and triglyceride kinetics in the two major VLDL subfractions: large triglyceride-rich VLDL1 and smaller, less triglyceride-rich VLDL2. VLDL1-apoB100 production was markedly reduced in homozygote TM6SF2 E167K carriers compared to controls. Likewise, VLDL1-triglyceride production was 35% lower in the TM6SF2 E167K carriers. In contrast, the direct production rates for VLDL2-apoB100 and triglyceride were not different between carriers and controls. In conclusion, the TM6SF2 E167K genetic variant was linked to a specific reduction in hepatic secretion of large triglyceride-rich VLDL1. The impaired secretion of VLDL1 explains the reduced plasma triglyceride concentration, and provides a basis for understanding the lower risk of cardiovascular disease associated with the TM6SF2 E167K genetic variant.Trial registration: Clinical Trials NCT04209816.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Kardiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)

Keyword

Hepatology
Lipoproteins
Metabolism

Publication and Content Type

ref (subject category)
art (subject category)

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